ICloud

I have a shared iCloud account I use for business purposes but I want to keep it completely separate from my regular emails to avoid any issues down the road. I already use the native app and the Outlook app for other things so those are eliminated. Apple already gives me headaches making me send email with the wrong email address as it is.

Any other free email apps that are compatible with an iCloud email address?

I don’t need anything fancy. Just literally needs to let me read emails. I can always do the maintenance on desktop when I am home.

Thanks in advance.

UPDATE: I’ve created an iCloud account after great feedback here, and I’m in the process of updating my email to some services. Thanks for all the help everyone.

For context, I’ve only ever used Gmail, and when I first made my primary email account I was using the same password for everything. Now that I use a password manager and 2FA, I want to separate that Gmail account and use it for social media, random sites, etc.

The issue is my name is common, and I’m also out of making more Gmail accounts associated with my phone number. Therefore, iCloud Mail is what I seem to gear towards as my plan, as I doubt anyone would have the exact same name as me when I include my middle name (despite that someone does on Gmail).

Can I trust iCloud Mail when it comes to sensitive data as that?

Ps. I asked a similar question a few days ago regarding it being good for “professional” purposes and business-related purposes isn’t what I meant. I understand how using a custom domain is necessary for businesses, but I’m not using this as a business email.

TL;DR: I’m changing email services for specific sites and services and want to know if I can trust it. I don’t think I require a custom domain and it’s simply to separate random shit from more important things. Side note, I don’t care about using two mail apps (ie. I don’t need my Gmail connected to iCloud Mail if it isn’t necessary).